Bed-plate for printing machinery.



`PATENTE) DBO. 24, 1907.

M. RooKsTRQH. BBD PLATE PQR PRINTING MACHINERY.

P PLIOATION FILED AUG. 1. 1906.

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PATENTND 1330.24, 19o?.

No. 874,626.v

M. ROGKSTROH. BED PLATE PoR PRINTING MACHINERY..

APPLICATION FILED AUG. 1. 1906.

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No. 874,626. PATENTBD DBG. 24, 1 907.

. M. ROCKSTROH.

BED PLATE FOR PRINTING MACHINERY.' APPLIoATIoN FILEDl A'UG, 1. 1906.

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MAX ROGKSTROH, OF KLEIN-SEDLITZ, GERMANY.

BED-PLATE FOR PRINTING MACHINERY.

Specification of Letters Patent.

Patented Dec. 24, 1907.

Application filed August l, 1906. Serial No. 328,746.

T 0 all whom t may concern.'

Be it known that I, MAX RocnsTROH, director, a subject of the GermanEmperor, residing at Klein-Sedlitz, Germany, have invented certain newand useful Improvements in Bed-Plates for Printing l\/Iachinery, ofwhich the following is a specilication.

The requirements o' printing, which are constantly growing morestringent, render it indispensable in printing machinery thatvibrationsshould be reduced to the greatest possible extent.

The bedplate of printing presses has heretofore been composed of a largenumber oic separate parts; usually it has consisted oi a number oi'blocks upon which the rails were screwed down and of laterally arrangedparts mounted upon the bedplate for the-reception of the cylinderbearings. Ihen very large sheets such as are now frequently employed inbook printing are used, and the press runs at a very high speed, itoften happens that through the inertia of the masses, especially that ofthe reciprocating carriage, there are set up in the press vibrationswhich when delicate pictures are to be printed, atleet the workinjuriously, by causing the parts to become loose and to shift theirpositions and the 'fine screws of the autotypes to be worn I outprematurely, when larger editions are printed.

To render the press stable it is consequently necessary that thebedplate should consist of as few separateparts as possible and that thescrewing together oi' separate pieces should be reduced to a minimum.For this purpose in a press in accordance with this invention, thebedplate together with the guides for the driving mechanism and thesupports for the press stone and the printing cylinder, are formed intwo parts only. The two halves of the bedplatetogether with the guidesand with the cylinder bearings 'form the entire supporting framework.The two halves are screwed together and, by means of the spring wedges,rigidly connected with each other. As the pressure exerted can act onlyin a vertical direction from the printing cylinder bearings to theguides, it is impossible that the bedplate should ever change itsposition.

Figure l of the accompanying drawing is a side eleva ion of' a two-partbedplate in accordance with this invention. Fig. 2 is an end elevationof the same viewed in the di reci'ion of the arrow in Fig. l; and Fig. 3is a plan thereof.

rIhe bedplaie uith the guides and the cylinder bearings consists, asshown in Figs. 2 and 3, of `the tuo halves a which together with thebearing b of the cylinder and the guides c belonging thereto constitutethe en tire bedplaie. The end of 'the driving mechanism of 'the carriageslides on the surfaces d. The spring v'edges e by means of which the tuohalves of he bedplale are rigidly secured togeher are shoa'n in Figs. land 2.

Having now' particularly described and as certained the nature of mysaid invenrion and in what manner the same is to be performed, I declarethat what I claim is:

l. In a priniing press, a frame composed of tuo side secions havingstandards forming bearings for a cylinder, said sections also forming abed plae, guide ribs arranged longitudinally of the bed plate, saidsections provided n ith grooves forming carriage slide, means forconnect-ing the sections, and wedge members for securely holding theseciions togelher.

2. In a printing press involving a frame, tv, o sections forming aribbed bed plate, each of said sections having standards formingbearings 'for a priniing press cylinder, said seci ions havingguide-nays forming carriage slides, each of said secr ions being formedin a single piece, means 'for `ioinirig `lthe sections to each other,and r-'edges interposed betr. een the sections to rigidly hold the latier in proper posi` ion with respect to each other.

Y, In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

MAX ROCKSTRGH.

Witnesses:

PAUL E. SonrLLrNe, PAUL ARRAS.

